Question
Suppose we have a fair 3-sided die, with possible outcomes {1, 2, 3}. We roll the die 6 times. Let X be the number of
Suppose we have a fair 3-sided die, with possible outcomes {1, 2, 3}. We roll the die 6 times. Let X be the number of 1s, and Y the number of 2s. Find each of the following:
(a) P(X=Y).
(b) E(X Y ).
(c) V (X Y ).
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Introduction to graph theory
Authors: Douglas B. West
2nd edition
131437372, 978-0131437371
